It's worth noting, as well, that duplicating one of your questions (especially a closed one) is frowned upon on any of the SE communities. If your question is closed due to it being off-topic reposting it doesn't make it on-topic (and gold badgers may well just close your post as an exact dupe). If your question is off-topic you should be trying to amend it to be on topic, rather than reposting it.

Thanks @Blackwood. I think Mokubai has certainly hit the nail on the head here with their answer, which I've accepted. Although I could give an explicit example, he's pretty much covered it well. On a separate note, i'd love to know what the downvotes are for. According to the Votes page, downvotes are for whenever you encounter an egregiously sloppy, no-effort-expended post, or an answer that is clearly and perhaps dangerously incorrect. Perhaps the voters would consider using the comments for constructive feedback? :)

Thanks Mokubai, this was much more what i was looking at. The views I had expressed at me seemed to more imply that comments were and should be deleted; which your's doesn't actually say, just that they might. You certainly add the word "preferentially", which means that it seems (in my view) that some else's reference was being pushed on me (not a welcoming experience for a new user to SU). This does sum up well what they should be used for. It certainly at least points out, that in my opinion, that comments informative comments should be flagged for deletion.